---
title: Minimizing the Effect of Load Fluctuations for Mixers
description: The viscosity change in liquids can vary the torque required for mixing.  For AC asynchronous motors such as AC induction motors, the rated speed is affected by load torque fluctuations, which may cause inconsistency in the final product.  Is there a better motor for the job?
image: https://blog.orientalmotor.com/hubfs/AC%20motor%20mixer.jpg
---

[![Oriental Motor U.S.A. Corp.](https://blog.orientalmotor.com/hs-fs/hubfs/OM-logo-200px.jpg?width=200&height=47&name=OM-logo-200px.jpg)](https://www.orientalmotor.com/index.html)

- <https://blog.orientalmotor.com>
- [Products](https://www.orientalmotor.com/products/index.html)
- [Motor Sizing](https://www.orientalmotor.com/motor-sizing/index.html)
- [Technology](https://www.orientalmotor.com/technology/index.html)
- [FAQ](https://faq.orientalmotor.com/)
- [Contact Us](https://www.orientalmotor.com/contact/index.html)

- [Stepper Motors](https://www.orientalmotor.com/stepper-motors/index.html)
- [Servo Motors](https://www.orientalmotor.com/servo-motors/index.html)
- [Industrial Robots](https://www.orientalmotor.com/industrial-robots/index.html)
- [AC Motors & Gear Motors](https://www.orientalmotor.com/ac-motors-gear-motors/index.html)
- [Brushless DC Motors](https://www.orientalmotor.com/brushless-dc-motors-gear-motors/index.html)
- [Linear Actuators](https://www.orientalmotor.com/linear-actuators/index.html)
- [Rotary Actuators](https://www.orientalmotor.com/rotary-actuators/index.html)
- [Network Products](https://www.orientalmotor.com/network-products/index.html)
- [Cooling Fans](https://www.orientalmotor.com/cooling-fans/index.html)
- [Encoders](https://www.orientalmotor.com/encoders-sensors/index.html)

Engineering Notes

## Engineering Notes by Oriental Motor

# [Minimizing the Effect of Load Fluctuations for Mixers](https://blog.orientalmotor.com/minimizing-the-effect-of-load-fluctuations-for-mixers)

 \[fa icon="calendar"\] Originally posted on Jun 30, 2020 12:00:00 PM   
Last updated on June 17, 2021 / by [Johann Tang](https://blog.orientalmotor.com/author/johann-tang)

![Johann Tang](https://app.hubspot.com/settings/avatar/8cc777610596a2b2230de2963e906c0b)

- [Tweet](https://twitter.com/share)

The viscosity change in liquids can vary the torque required for mixing.  For AC asynchronous motors such as AC induction motors, the rated speed is affected by load torque fluctuations, which may cause inconsistency in the final product.  Is there a better motor for the job?

| **Challenge** | Mixing liquids of different viscosity at stable speeds |
| --- | --- |

|   ![Mixer with AC motor](https://blog.orientalmotor.com/hs-fs/hubfs/AC%20motor%20mixer.jpg?width=275&name=AC%20motor%20mixer.jpg)   | **Conventional Equipment** We show a traditional hand-held mixer here.  Typically, a 3-phase AC induction motor is selected as the motion device for a mixer.  A variable frequency drive (VFD), or inverter, is used to control the speed of the motor. |
| --- | --- |

**Problems with Conventional Equipment**

The viscosity can change during mixing.  This causes the load torque to fluctuate, which changes the speed of the motor, resulting in inconsistent quality.

 

![How viscosity can affect load torque](https://blog.orientalmotor.com/hs-fs/hubfs/image-Jun-26-2020-12-03-22-42-AM.png?width=600&name=image-Jun-26-2020-12-03-22-42-AM.png)

 

| **Solution** | Use a brushless motor with closed-loop feedback |
| --- | --- |

Brushless motors operate with closed-loop feedback from hall-effect sensors.  This ensures tight speed regulation even with load fluctuations.  Compared to AC motors, brushless motors are also much more efficient and therefore more compact.  The constant torque output from brushless motors also ensures the same torque being applied (up to rated speed).  Brushless motors also offer a wider speed range when compared to AC motors driven with VFDs.  

|   ![Mixer with brushless motor](https://blog.orientalmotor.com/hs-fs/hubfs/Brushless%20motor%20mixer.jpg?width=275&name=Brushless%20motor%20mixer.jpg)   | **Brushless Motor Benefits** - Smaller - Lighter - Higher efficiency - No fan necessary - Lower operating temperature - Constant torque output - Wider speed range - IP65/IP66/IP67 protection |
| --- | --- |

**Smaller and Lighter Design**

Upgrade an AC motor to a brushless motor for smaller and lighter designs.  More details can be found in the comparison table below.

**Comparison Between AC Induction Motors and Brushless Motors (Round-Shaft Type)**

![Comparison between AC induction motors and brushless motors](https://blog.orientalmotor.com/hubfs/image-Jun-26-2020-02-41-37-78-AM.png)

|   | **BMU Series** | **BLH Series** |
| --- | --- | --- |
| External View | [![BMU Series motor and panel mount driver](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/2284573/08d7a4e8-c1e4-45b9-88e5-f982a8a93515.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/2284573/08d7a4e8-c1e4-45b9-88e5-f982a8a93515) | [![BLH Series BLDC motor and compact driver](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/2284573/384cdb3b-dd0d-4533-ae28-a8ec82cf25a7.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/2284573/384cdb3b-dd0d-4533-ae28-a8ec82cf25a7) |
| Power Supply Input | Single-Phase 100-120 VAC Single/Three-Phase 200-240 VAC | 24 VDC |
| Output | 30 W, 60 W, 120 W, 200 W, 400 W | 15 W, 30 W, 50 W, 100 W |
| Speed Regulation (Load) | ±0.2% (Digital) | ±0.5% (Analog), ±0.2% (Digital) |
| Speed Control Range | 80~4000 RPM | 80~3000 RPM |
| Speed Setting Method | Digital | Digital/Analog/RS-485 |

 

| **TIP**: for low speed applications |
| --- |
| Brushless motors cover a wider speed range than AC motors driven by VFDs.  This means that brushless motors can operate at a lower RPM and higher RPM.  For example, the [![BX II Series](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/2284573/518c8643-d2aa-41be-a155-bc67367863ba.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/2284573/518c8643-d2aa-41be-a155-bc67367863ba) can operate as low as 0.01 RPM (with a 200:1 gear ratio).  The reason is because the BXII Series brushless motors use encoders instead of hall-effect sensors. |

| [![Brushless gear motor with H1 food grade grease](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/2284573/297543bc-d495-4382-be5f-2994d791b3d7.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/2284573/297543bc-d495-4382-be5f-2994d791b3d7) | For mixers or agitators that are used for food applications, brushless gear motors with H1 food-grade grease are available.  **Gear motors with H1 food-grade grease** are currently available from BMU Series and BLE2 Series.  Please contact our technical support team for more information.   [![Contact Our Experts](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/2284573/cf5fb627-a9ca-489c-9f5a-f0e28f4bc7a9.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/2284573/cf5fb627-a9ca-489c-9f5a-f0e28f4bc7a9) |
| --- | --- |

![H1 food-grade grease info](https://blog.orientalmotor.com/hubfs/image-Jun-26-2020-01-08-30-64-AM.png)

 

Thanks for reading this post.  Here are some videos for the products discussed in this post.

Here's a video introducing **brushless motors** as the new standard in speed control.

Here's a video of a **BMU Series** brushless motor with its speed controller (driver) on a belt conveyor.

Here's a video of **BLH Series** brushless motors demonstrating driving and steering in an AGV.

 

[![Browse All Brushless Motors](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/2284573/dbe1edb6-01d3-4136-8e47-d8a8434c0a8b.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/2284573/dbe1edb6-01d3-4136-8e47-d8a8434c0a8b)

Please subscribe to receive my new posts. 

 

 Topics: [Speed Control](https://blog.orientalmotor.com/topic/speed-control), [VIDEOS](https://blog.orientalmotor.com/topic/videos), [BLDC Motors](https://blog.orientalmotor.com/topic/bldc-motors), [Gearheads](https://blog.orientalmotor.com/topic/gearheads), [Washdown](https://blog.orientalmotor.com/topic/washdown), [Application Examples](https://blog.orientalmotor.com/topic/application-examples)

![Johann Tang](https://app.hubspot.com/settings/avatar/8cc777610596a2b2230de2963e906c0b)

#### Written by [Johann Tang](https://blog.orientalmotor.com/author/johann-tang)

Johann Tang is a Product Specialist at Oriental Motor USA Corp. Before joining the marketing team, he spent 14 years in sales and technical application support, and he also led product training on various types of fractional-horsepower electric motors, gear motors, actuators, drivers, and controllers. If you have any questions, please feel free to use the live chat window, 1-800-GO-VEXTA (1-800-468-3982), or techsupport@orientalmotor.com, to reach our product support team. Sorry, comments have been turned off.

[\[fa icon="linkedin-square"\]Linkedin](https://www.linkedin.com/in/johanntang/)

Search

### Subscribe Here!

- Recent
- Popular
- Categories

### Lists by Topic

- [Stepper Motors (61)](https://blog.orientalmotor.com/topic/stepper-motors)
- [VIDEOS (59)](https://blog.orientalmotor.com/topic/videos)
- [Application Examples (47)](https://blog.orientalmotor.com/topic/application-examples)
- [Speed Control (47)](https://blog.orientalmotor.com/topic/speed-control)
- [BLDC Motors (46)](https://blog.orientalmotor.com/topic/bldc-motors)
- [Alphastep Hybrid Control (40)](https://blog.orientalmotor.com/topic/alphastep-hybrid-control)
- [Absolute Positioning (35)](https://blog.orientalmotor.com/topic/absolute-positioning)
- [Linear Actuators (34)](https://blog.orientalmotor.com/topic/linear-actuators)
- [AC Motors (32)](https://blog.orientalmotor.com/topic/ac-motors)
- [Robotics (25)](https://blog.orientalmotor.com/topic/robotics)
- [Motion Control Basics (20)](https://blog.orientalmotor.com/topic/motion-control-basics)
- [Gearheads (17)](https://blog.orientalmotor.com/topic/gearheads)
- [Software (17)](https://blog.orientalmotor.com/topic/software)
- [Incremental Positioning (16)](https://blog.orientalmotor.com/topic/incremental-positioning)
- [Servo Motors (15)](https://blog.orientalmotor.com/topic/servo-motors)
- [Factory Automation (13)](https://blog.orientalmotor.com/topic/factory-automation)
- [Motor Sizing (13)](https://blog.orientalmotor.com/topic/motor-sizing)
- [Product Introductions (13)](https://blog.orientalmotor.com/topic/product-introductions)
- [Conveyors (12)](https://blog.orientalmotor.com/topic/conveyors)
- [Network (11)](https://blog.orientalmotor.com/topic/network)
- [Food & Packaging (10)](https://blog.orientalmotor.com/topic/food-packaging)
- [Medical (10)](https://blog.orientalmotor.com/topic/medical)
- [Technical Manual Series (9)](https://blog.orientalmotor.com/topic/technical-manual-series)
- [Stepper Drivers (8)](https://blog.orientalmotor.com/topic/stepper-drivers)
- [Rotary Actuators/Index Tables (7)](https://blog.orientalmotor.com/topic/rotary-actuators-index-tables)
- [Troubleshooting (6)](https://blog.orientalmotor.com/topic/troubleshooting)
- [Washdown (6)](https://blog.orientalmotor.com/topic/washdown)
- [Case Studies (5)](https://blog.orientalmotor.com/topic/case-studies)
- [Encoders (5)](https://blog.orientalmotor.com/topic/encoders)
- [Grip Conveyors (5)](https://blog.orientalmotor.com/topic/grip-conveyors)
- [Semiconductors (5)](https://blog.orientalmotor.com/topic/semiconductors)
- [Product Demos (4)](https://blog.orientalmotor.com/topic/product-demos)
- [Smooth Drive (4)](https://blog.orientalmotor.com/topic/smooth-drive)
- [Torque Limit (Push Motion, Tension Control) (4)](https://blog.orientalmotor.com/topic/torque-limit-push-motion-tension-control)
- [Vertical Lifts (4)](https://blog.orientalmotor.com/topic/vertical-lifts)
- [XYZ/Cartesian/Gantry (4)](https://blog.orientalmotor.com/topic/xyz-cartesian-gantry)
- [AGV/AMR (3)](https://blog.orientalmotor.com/topic/agv-amr)
- [Bottle Capping (3)](https://blog.orientalmotor.com/topic/bottle-capping)
- [Cooling Fans (3)](https://blog.orientalmotor.com/topic/cooling-fans)
- [Service Life (3)](https://blog.orientalmotor.com/topic/service-life)
- [Laboratory (2)](https://blog.orientalmotor.com/topic/laboratory)
- [Pumps (2)](https://blog.orientalmotor.com/topic/pumps)
- [Chemical Mechanical Polishing (1)](https://blog.orientalmotor.com/topic/chemical-mechanical-polishing)
- [Wafer Handling (1)](https://blog.orientalmotor.com/topic/wafer-handling)
- [Wafer Pin Lifters (1)](https://blog.orientalmotor.com/topic/wafer-pin-lifters)

see all

### Posts by Topic

- [Stepper Motors (61)](https://blog.orientalmotor.com/topic/stepper-motors)
- [VIDEOS (59)](https://blog.orientalmotor.com/topic/videos)
- [Application Examples (47)](https://blog.orientalmotor.com/topic/application-examples)
- [Speed Control (47)](https://blog.orientalmotor.com/topic/speed-control)
- [BLDC Motors (46)](https://blog.orientalmotor.com/topic/bldc-motors)
- [Alphastep Hybrid Control (40)](https://blog.orientalmotor.com/topic/alphastep-hybrid-control)
- [Absolute Positioning (35)](https://blog.orientalmotor.com/topic/absolute-positioning)
- [Linear Actuators (34)](https://blog.orientalmotor.com/topic/linear-actuators)
- [AC Motors (32)](https://blog.orientalmotor.com/topic/ac-motors)
- [Robotics (25)](https://blog.orientalmotor.com/topic/robotics)
- [Motion Control Basics (20)](https://blog.orientalmotor.com/topic/motion-control-basics)
- [Gearheads (17)](https://blog.orientalmotor.com/topic/gearheads)
- [Software (17)](https://blog.orientalmotor.com/topic/software)
- [Incremental Positioning (16)](https://blog.orientalmotor.com/topic/incremental-positioning)
- [Servo Motors (15)](https://blog.orientalmotor.com/topic/servo-motors)
- [Factory Automation (13)](https://blog.orientalmotor.com/topic/factory-automation)
- [Motor Sizing (13)](https://blog.orientalmotor.com/topic/motor-sizing)
- [Product Introductions (13)](https://blog.orientalmotor.com/topic/product-introductions)
- [Conveyors (12)](https://blog.orientalmotor.com/topic/conveyors)
- [Network (11)](https://blog.orientalmotor.com/topic/network)
- [Food & Packaging (10)](https://blog.orientalmotor.com/topic/food-packaging)
- [Medical (10)](https://blog.orientalmotor.com/topic/medical)
- [Technical Manual Series (9)](https://blog.orientalmotor.com/topic/technical-manual-series)
- [Stepper Drivers (8)](https://blog.orientalmotor.com/topic/stepper-drivers)
- [Rotary Actuators/Index Tables (7)](https://blog.orientalmotor.com/topic/rotary-actuators-index-tables)
- [Troubleshooting (6)](https://blog.orientalmotor.com/topic/troubleshooting)
- [Washdown (6)](https://blog.orientalmotor.com/topic/washdown)
- [Case Studies (5)](https://blog.orientalmotor.com/topic/case-studies)
- [Encoders (5)](https://blog.orientalmotor.com/topic/encoders)
- [Grip Conveyors (5)](https://blog.orientalmotor.com/topic/grip-conveyors)
- [Semiconductors (5)](https://blog.orientalmotor.com/topic/semiconductors)
- [Product Demos (4)](https://blog.orientalmotor.com/topic/product-demos)
- [Smooth Drive (4)](https://blog.orientalmotor.com/topic/smooth-drive)
- [Torque Limit (Push Motion, Tension Control) (4)](https://blog.orientalmotor.com/topic/torque-limit-push-motion-tension-control)
- [Vertical Lifts (4)](https://blog.orientalmotor.com/topic/vertical-lifts)
- [XYZ/Cartesian/Gantry (4)](https://blog.orientalmotor.com/topic/xyz-cartesian-gantry)
- [AGV/AMR (3)](https://blog.orientalmotor.com/topic/agv-amr)
- [Bottle Capping (3)](https://blog.orientalmotor.com/topic/bottle-capping)
- [Cooling Fans (3)](https://blog.orientalmotor.com/topic/cooling-fans)
- [Service Life (3)](https://blog.orientalmotor.com/topic/service-life)
- [Laboratory (2)](https://blog.orientalmotor.com/topic/laboratory)
- [Pumps (2)](https://blog.orientalmotor.com/topic/pumps)
- [Chemical Mechanical Polishing (1)](https://blog.orientalmotor.com/topic/chemical-mechanical-polishing)
- [Wafer Handling (1)](https://blog.orientalmotor.com/topic/wafer-handling)
- [Wafer Pin Lifters (1)](https://blog.orientalmotor.com/topic/wafer-pin-lifters)

see all

### Recent Posts

[![New call-to-action](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/2284573/f24cd0b7-792e-4246-a809-1f6331235405.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/2284573/f24cd0b7-792e-4246-a809-1f6331235405)

[![product-guide-gray-drop-shadow](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/2284573/interactive-194050460599.png)](https://blog.orientalmotor.com/hs/cta/wi/redirect?encryptedPayload=AVxigLIoWe%2FEPqF%2BS8MKVBdFaZdqFOFiBTFdqTCSe0TCVCfCMXA6TI8fligyWtoMM6Ag5A6Nr6U1O6FG0bM8FHbKBMlE19S6a3nTjsgSAX2fakrqHv13aaa18jiyFkY%2Fhdi%2FkLlcKvECFhd%2FD8GRDyd5JwfK6jS%2F14zKQcbYo9tGhtgCx3sV0RPfzoldv37cs4DSWBFSj6Ozslp1%2FEo%3D&webInteractiveContentId=194050460599&portalId=2284573)

#### About Us

Oriental Motor offers an extensive product line-up of about 50,000 different products that provide the optimal motion system. For over a century we have concentrated on technological advancement and product design improvement. This emphasis is evident in the sophisticated devices that we market today. Oriental Motor's sales and service network is international, with offices throughout North America, Europe and Asia.

#### More Links

- [\[fa icon="caret-right"\] Home](http://www.orientalmotor.com)
- [\[fa icon="caret-right"\] About Us](http://www.orientalmotor.com/company/index.html)
- [\[fa icon="caret-right"\] Contact Us](http://www.orientalmotor.com/contact/index.html)

#### Contact Us

\[fa icon="phone"\]  1-800-GO-VEXTA (468-3982)

\[fa icon="envelope"\]  sales@orientalmotor.com

\[fa icon="home"\]  570 Alaska Avenue, Torrance CA 90503

\[fa icon="chevron-up"\]Back to top

```json
{
  "@context" : "https://schema.org",
  "@type" : "BlogPosting",
  "author" : {
    "@type" : "Person",
    "name" : "Johann Tang",
    "url" : "https://blog.orientalmotor.com/author/johann-tang"
  },
  "dateModified" : "2021-06-17T23:21:55.738Z",
  "datePublished" : "2020-06-30T16:00:00.000Z",
  "headline" : "Minimizing the Effect of Load Fluctuations for Mixers",
  "image" : [ "https://blog.orientalmotor.com/hubfs/AC%20motor%20mixer.jpg" ],
  "mainEntityOfPage" : {
    "@id" : "https://blog.orientalmotor.com/minimizing-the-effect-of-load-fluctuations-for-mixers",
    "@type" : "WebPage"
  },
  "publisher" : {
    "@type" : "Organization",
    "logo" : {
      "@type" : "ImageObject",
      "url" : "https://blog.orientalmotor.com/hubfs/OM-brand-logo-640x83.jpg"
    },
    "name" : "Oriental Motors"
  }
}
```

```json
{
  "@context" : "https://schema.org",
  "@type" : "VideoObject",
  "contentUrl" : "https://2284573.fs1.hubspotusercontent-na2.net/hubfs/2284573/Brushless%20Motors%20The%20New%20Standard%20of%20Speed%20Control.mp4",
  "dateModified" : "2022-05-26T21:08:57.279Z",
  "duration" : "PT1M4S",
  "height" : 1080,
  "name" : "Brushless Motors The New Standard of Speed Control",
  "thumbnailUrl" : "https://api-na2.hubspot.com/filemanager/api/v3/files/thumbnail-redirect/31300167374?portalId=2284573&size=medium",
  "uploadDate" : "2020-06-26T01:21:34.014Z",
  "width" : 1920
}
```

```json
{
  "@context" : "https://schema.org",
  "@type" : "VideoObject",
  "contentUrl" : "https://2284573.fs1.hubspotusercontent-na2.net/hubfs/2284573/Easy%20to%20Use%20Brushless%20DC%20Motors%20&%20AC%20Input%20Drivers%20Speed%20Control%20System.mp4",
  "dateModified" : "2022-05-26T21:06:34.415Z",
  "duration" : "PT2M36S",
  "height" : 720,
  "name" : "Easy to Use Brushless DC Motors & AC Input Drivers Speed Control System",
  "thumbnailUrl" : "https://api-na2.hubspot.com/filemanager/api/v3/files/thumbnail-redirect/9207431762?portalId=2284573&size=medium",
  "uploadDate" : "2019-04-29T17:37:55.735Z",
  "width" : 1280
}
```

```json
{
  "@context" : "https://schema.org",
  "@type" : "VideoObject",
  "contentUrl" : "https://2284573.fs1.hubspotusercontent-na2.net/hubfs/2284573/BLH%20Series%20-%20AGV%20Demonstration.mp4",
  "dateModified" : "2022-05-26T21:04:37.469Z",
  "duration" : "PT1M25S",
  "height" : 1080,
  "name" : "BLH Series - AGV Demonstration",
  "thumbnailUrl" : "https://api-na2.hubspot.com/filemanager/api/v3/files/thumbnail-redirect/9905263518?portalId=2284573&size=medium",
  "uploadDate" : "2019-05-23T23:20:55.984Z",
  "width" : 1920
}
```